CN108679231A - Turbo-generator Set hydrogen seal device and encapsulating method - Google Patents
Turbo-generator Set hydrogen seal device and encapsulating method Download PDFInfo
- Publication number
- CN108679231A CN108679231A CN201810841627.8A CN201810841627A CN108679231A CN 108679231 A CN108679231 A CN 108679231A CN 201810841627 A CN201810841627 A CN 201810841627A CN 108679231 A CN108679231 A CN 108679231A
- Authority
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- Prior art keywords
- sealing
- sealing ring
- ring
- alternator shaft
- seal
- Prior art date
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- 239000001257 hydrogen Substances 0.000 title claims abstract description 37
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 9
- 125000004435 hydrogen atom Chemical class [H]* 0.000 title 1
- 238000007789 sealing Methods 0.000 claims abstract description 180
- 238000007667 floating Methods 0.000 claims abstract description 68
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 150000002431 hydrogen Chemical class 0.000 claims abstract description 18
- 230000000694 effects Effects 0.000 claims abstract description 15
- 239000010408 film Substances 0.000 claims description 18
- 230000003068 static effect Effects 0.000 claims description 4
- 238000005461 lubrication Methods 0.000 claims description 3
- 230000013011 mating Effects 0.000 claims description 3
- 239000010409 thin film Substances 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims 1
- 239000003921 oil Substances 0.000 description 30
- 239000012634 fragment Substances 0.000 description 6
- 230000006378 damage Effects 0.000 description 3
- 125000002950 monocyclic group Chemical group 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000010977 unit operation Methods 0.000 description 2
- 125000002619 bicyclic group Chemical group 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000006049 ring expansion reaction Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
Abstract
The present invention relates to Turbo-generator Set hydrogen seal device and encapsulating methods, technical solution is, the resistance discs being fixed together with alternator shaft are set on the alternator shaft of seal receptacle opening, resistance discs stretch into the inner cavity of seal receptacle from the opening of seal receptacle, the first sealing ring and the second sealing ring axially to horizontally slip along alternator shaft is respectively arranged in the seal receptacle of resistance discs both sides, resistance discs are provided with the first uniformly distributed helicla flute of multiple tracks on the periphery of the first sealing ring right opposite, resistance discs are provided with the second uniformly distributed helicla flute of multiple tracks on the periphery of the second sealing ring right opposite, compared with prior art, it needs to seal by the two-stage screw slot type dynamic pressure oil film between sealing ring and resistance discs when hydrogen gas leakage of the present invention and the two-stage groove type dynamic pressure oil film between sealing floating ring and alternator shaft seals, leakage rate is small；The seal clearance very little formed by helicla flute dynamic pressure effect between sealing ring and resistance discs, so as to effectively reduce leakage.
Description
Technical field
The present invention relates to the encapsulating methods between a kind of hydrogen-cooled turbo-alternator both ends sound component, reduce hydrogen along axis
The leakage at end and the harm to unit safety operation therefore brought, are mainly used for hydrogen-cooled generator hydrogen seal.
Background technology
With the increase of generating set single-machine capacity, the heat generated in generator operation increases.In order to improve cooling effect
Fruit, Generator Set generally uses hydrogen as cooling medium, to substitute water or air.Between having between generator sound component
Gap, hydrogen can be along clearance leakages between the two.Hydrogen belongs to flammable explosive gas, and aerial concentration reaches certain
After degree, it will cause explosion, will will produce significant damage to unit safety operation and human life.Therefore, in unit operation,
The stringent leakage for forbidding hydrogen.
In order to reduce the leakage of hydrogen, the generator end at hydrogen-cooled generator group shaft both ends, which covers, is respectively equipped with 1 set
Sealing bearing bush mainly uses circulation type at present.According to the quantity of oil circuit, it is divided into single current, double-current method or three streamings, according to tile fragment
Quantity is divided into monocyclic or dicyclic, and after oil circuit and packing ring combination, sealing bearing bush can be divided into：Single stream monocyclic, Dan Liushuan
Ring type, double-current monocyclic etc..Although oil circuit is different with the quantity of sealing ring, the operation principle of circulation type sealing bearing bush is identical, this
A kind of floating sealing or floating type sliding bearing are belonged in matter.When unit operation, by hydrogen pressure in slightly above generator
Seal Oil is entered across tile fragment in the gap tile fragment and axle journal from tile fragment back, caused by axle journal high speed rotation
Dynamic pressure effect floats sealing ring, and lubricating oil is full of between dynamic and static gaps, to by hydrogen gas leakage channel blockage, play
Sealing effect.
There are following several respects when being applied in hydrogen cooled generator group in circulation type sealing bearing bush：(1) floating power is inadequate.
After generator hydrogen pressure increases, the pressure difference between hydrogen side and empty side becomes larger, and after Hydrogen Vapor Pressure acts on sealing ring end face, can be formed
One axial thrust, pushes sealing ring to side, leads to tile fragment bite, can not achieve between tile fragment and axle journal change in location with
It is dynamic；(2) after sealing bearing bush bite, pad temperature raising is not only resulted in, and can therefore generate unstable vibration；(3) it seals
Watt gap is unable to very little.The too small easy watt temperature that causes in sealing bearing bush gap increases, after sealing bearing bush gap increases, not only hydrogen gas leakage amount
It will increase, seal oil flow also will increase, and Seal Oil is possible to pour in down a chimney into engine block, and generator insulating is caused to decline
Etc. other failures.Therefore, the research efficient sealed method of hydrogen-cooled generating set just seems critically important.
Invention content
For the above situation, to overcome the defect of the prior art, the purpose of the present invention to be just to provide a kind of steam turbine generator
Group hydrogen seal device and encapsulating method, can effectively reduce hydrogen along shaft end leakage and therefore and bring to unit safety
The harm of operation.
The technical solution that the present invention solves is：
A kind of Turbo-generator Set hydrogen seal device, including alternator shaft and the hair that is arranged on the outside of alternator shaft
Electric motor end cap, the seal receptacle being fixed together with generator's cover is provided on the outside of alternator shaft, and seal receptacle is opening court
To the inside opening hollow structure of alternator shaft, it is set on the alternator shaft of seal receptacle opening solid with alternator shaft
It is scheduled on resistance discs together, resistance discs stretch into the inner cavity of seal receptacle from the opening of seal receptacle, in the seal receptacle of resistance discs both sides
It is respectively arranged with the first sealing ring and the second sealing ring axially to horizontally slip along alternator shaft, resistance discs and the first sealing ring
Be provided with the first uniformly distributed helicla flute of multiple tracks on the periphery of right opposite, resistance discs be provided on the periphery of the second sealing ring right opposite it is more
The second uniformly distributed helicla flute of road is provided with the first O-ring seal, the second sealing ring and sealing between the first sealing ring and seal receptacle
It is provided with the 2nd O type sealing rings between seat, the inside of the first sealing ring and the second sealing ring is stretched into towards alternator shaft close
It seals seat opening and is in alternate setting with alternator shaft, stretch on the medial surface of the first sealing ring of seal receptacle opening and be provided with
First floating ring sliding groove of circular ring shape stretches on the medial surface of the second sealing ring of seal receptacle opening and is provided with the second of circular ring shape
Floating ring sliding groove is provided with the first sealing floating ring in the first floating ring sliding groove, the second sealing is provided in the second floating ring sliding groove
Floating ring, is provided with the first uniformly distributed groove of multiple tracks on the medial surface of the side of the first sealing floating ring and alternator shaft face, and second
Be provided with the second uniformly distributed groove of multiple tracks on the medial surface of the side of sealing floating ring and alternator shaft face, seal receptacle madial wall with
It is provided with the first spring between first sealing ring, second spring is provided between seal receptacle madial wall and the second sealing ring, generates electricity
When machine shaft is static, under the elastic force of the first spring and second spring, the right opposite of the first sealing ring and resistance discs is fitted in
Together, the second sealing ring and the right opposite of resistance discs fit together, and the close of inside and outside perforation is provided on the lateral wall of seal receptacle
Oil sealing entrance.
A kind of hydrogen seal method based on Turbo-generator Set hydrogen seal device, by outside from the Seal Oil of seal receptacle
Entrance introduces pressure higher than in the Seal Oil to seal receptacle of generator hydrogen gas side hydrogen pressure；Under generator operation state, resistance discs with
Alternator shaft high speed rotation, is generated at the helicla flute of resistance discs two sides and the sealing ring mating surface (right opposite) of respective side
Dynamic pressure effect forms axial opening force, both sides sealing ring and resistance discs is separated, i.e. the first sealing ring and the second sealing ring all edges
Alternator shaft axis direction is moved towards far from resistance discs direction, and gap, Seal Oil are formed between both sides sealing ring and resistance discs
Enter gap from helicla flute and fill gap, the gap between both sides sealing ring and resistance discs is made to be in Condition of Thin Film Lubrication,
Sealing oil film is formed in gap；Alternator shaft high speed rotation simultaneously, between the groove and alternator shaft that seal floating ring medial surface
Generate dynamic pressure effect, will sealing floating ring float get up, Seal Oil from the gap between sealing ring, resistance discs enter sealing floating ring,
Gap between alternator shaft forms sealing oil film, and sealing floating ring and alternator shaft are separated；By sealing ring and resistance
Between disk two-stage screw slot type dynamic pressure oil film sealing (between the first sealing ring of resistance discs and both sides, the second sealing ring) and
Seal between floating ring and alternator shaft the sealing of two-stage groove type dynamic pressure oil film (the first sealing floating ring, the second sealing floating ring with
Between alternator shaft), realize the efficient sealed of generator hydrogen gas leakage.
Compared with prior art, it has the following advantages that：
(1) needed when hydrogen gas leakage by between sealing ring and resistance discs two-stage screw slot type dynamic pressure oil film sealing and
The two-stage groove type dynamic pressure oil film sealing between floating ring and alternator shaft is sealed, leakage rate is small；
(2) under generator operation state, between the sealing formed by helicla flute dynamic pressure effect between sealing ring and resistance discs
Gap very little, so as to effectively reduce leakage；
(3) primary seal when hydrogen gas leakage is the two-stage screw slot type dynamic pressure oil film sealing between sealing ring and resistance discs,
Sealing floating ring is merely possible to auxiliary seal, and therefore, sealing the width of floating ring can be designed narrow, seals floating ring weight ratio
Relatively light, the groove of sealing floating ring inner surface design increases the buoyancy lift of sealing floating ring, and sealing floating ring both sides pressure difference is smaller, by
The axial force that this is generated is smaller, above-mentioned multinomial factor, can efficiently reduce the bite between sealing floating ring and alternator shaft
Phenomenon；
(4) it can effectively improve the unstable vibration phenomenon caused because of floating ring type sealing bearing bush bite.
Description of the drawings
Fig. 1 is the sectional view of the Turbo-generator Set hydrogen seal device of the present invention；
Fig. 2 is hydrogen gas leakage path profile (semi-cutaway) in the sealing device of the present invention；
Fig. 3 is the left view of resistance discs of the present invention；
Fig. 4 is the right view of resistance discs of the present invention；
Fig. 5 present invention seals the sectional view of floating ring；
Fig. 6 present invention seals the groove schematic diagram after floating ring expansion.
Specific implementation mode
The specific implementation mode of the present invention is described in further detail below in conjunction with attached drawing.
It is provided by Fig. 1-6, a kind of Turbo-generator Set hydrogen seal device of the present invention, including alternator shaft 12 and setting
Generator's cover 13 on the outside of alternator shaft, generator's cover 13 are stationary parts, and alternator shaft 12 is rotatable parts,
Alternator shaft 12 is passed through out of generator's cover 13 and can be rotated around its axis direction, and there are certain intervals for the two, ensure
Alternator shaft 12 does not contact when rotating with generator's cover 13, and the outside of alternator shaft 12 is provided with and generator's cover 13
The seal receptacle 2 being fixed together, seal receptacle 2 are inside opening hollow structure of the opening towards alternator shaft, and seal receptacle 2 is open
The resistance discs 1 being fixed together with alternator shaft are set on the alternator shaft 12 at place, resistance discs 1 are opened from seal receptacle 2
The inner cavity of seal receptacle is stretched at mouthful, is respectively arranged in the seal receptacle of 1 both sides of resistance discs and is axially horizontally slipped along alternator shaft
The first sealing ring 3 and the second sealing ring 4, be provided on the periphery of 3 right opposite of resistance discs 1 and the first sealing ring multiple tracks it is uniformly distributed
One helicla flute 16, is provided with the second uniformly distributed helicla flute 17 of multiple tracks on the periphery of 4 right opposite of resistance discs 1 and the second sealing ring, and first
It is provided with the first O-ring seal 7 between sealing ring 3 and seal receptacle 2, the 2nd O is provided between the second sealing ring 4 and seal receptacle 2
The inside of type sealing ring 8, the first sealing ring 3 and the second sealing ring 4 towards alternator shaft stretch into 2 opening of seal receptacle and with
Alternator shaft 12 is in alternate setting, stretches into and is provided with the of circular ring shape on the medial surface of the first sealing ring 3 of 2 opening of seal receptacle
One floating ring sliding groove 14 stretches into the second floating ring cunning that circular ring shape is provided on the medial surface of the second sealing ring 4 of 2 opening of seal receptacle
Slot 15 is moved, the first sealing floating ring 9 is provided in the first floating ring sliding groove 14, the second sealing is provided in the second floating ring sliding groove 15
Floating ring 10, the first sealing floating ring 9 are provided with the first uniformly distributed groove of multiple tracks on the medial surface of the side of 12 face of alternator shaft
9a, the second sealing floating ring 9 are provided with the second uniformly distributed groove 10a of multiple tracks on the medial surface of the side of 12 face of alternator shaft,
The first spring 5 is provided between 2 madial wall of seal receptacle and the first sealing ring 3, between 2 madial wall of seal receptacle and the second sealing ring 4
Be provided with second spring 6, when alternator shaft is static, under the elastic force of the first spring and second spring, the first sealing ring 3 with
The right opposite of resistance discs 1 fits together, and the second sealing ring 4 and the right opposite of resistance discs 1 fit together, outside seal receptacle 2
The inside and outside sealing oil-in 11 penetrated through is provided on side wall.
In order to ensure using effect, the depth of first helicla flute 16 and the second helicla flute 17 is 5 μm -10 μm；The
One helicla flute 16 and the second helicla flute 17 are penetrated through with the outer periphery of resistance discs, and Seal Oil is allow to quickly enter in helicla flute.
The depth of the first groove 9a and the second groove 10a are 5 μm -10 μm；First groove 9a and the second groove 10a are equal
For the rectangular channel of strip, it is inclined to set on the medial surface of corresponding sealing floating ring.
The right opposite of first sealing ring 3 and resistance discs 1 is mutually parallel and the axis of the right opposite and alternator shaft 12
Line is vertical, and the right opposite of the second sealing ring 4 and resistance discs 1 is mutually parallel and the axis of the right opposite and alternator shaft 12 hangs down
Directly.
The generator's cover 13, seal receptacle 2, resistance discs 1, the first sealing ring 3, the second sealing ring 4 section be circle
Annular, centre bore are passed through for alternator shaft.
The telescopic direction of first spring 5 is parallel with the axial direction of alternator shaft 12.So as in resilient force
Under so that the first sealing ring 3 is horizontally slipped, the first sealing ring 3 can be by being placed on 2 homonymy bottom plate of seal receptacle in end set
First lug boss 3a is supported the first lug boss of sliding and is supported on the bottom of seal receptacle, and the first spring is located at the first protrusion
The top in portion, the first O types sealing ring 7 may be provided between 2 bottom plate of the first lug boss and seal receptacle, and the first O-ring seal also may be used
To be axially moveable together with the first sealing ring, prevent hydrogen from being leaked from faying face；In actual use, it can also seal
The individual track of setting and the setting slide bar cooperation sliding corresponding with track on the first sealing ring in seat；
The telescopic direction of the second spring 6 is parallel with the axial direction of alternator shaft 12.So as in resilient force
Under so that the second sealing ring 4 is horizontally slipped, the second sealing ring 4 can be by being placed on 2 homonymy bottom plate of seal receptacle in end set
Second lug boss 4a is supported the second lug boss of sliding and is supported on the bottom of seal receptacle, and second spring is located at the second protrusion
The top in portion, the 2nd O types sealing ring 8 may be provided between 2 bottom plate of the second lug boss and seal receptacle；Second O-ring seal also may be used
To be axially moveable together with the second sealing ring, prevent hydrogen from being leaked from faying face；In actual use, it can also seal
The individual track of setting and the setting slide bar cooperation sliding corresponding with track on the second sealing ring in seat.
The present invention is higher than generator hydrogen gas side hydrogen pressure in use, introducing pressure from the sealing oil-in 11 of seal receptacle by outside
Seal Oil to seal receptacle in；Under generator operation state, resistance discs are with alternator shaft high speed rotation, resistance discs two sides
Helicla flute and respective side sealing ring mating surface (right opposite) at generate dynamic pressure effect, form axial opening force, both sides are close
Seal ring and resistance discs separate, i.e. the first sealing ring and the second sealing ring are all along alternator shaft axis direction towards far from resistance discs side
To movement, gap is formed between both sides sealing ring and resistance discs, gap very little (within 10 μm) between the two, Seal Oil is from spiral shell
Spin slot enters gap and fills gap, and the gap between both sides sealing ring and resistance discs is made to be in Condition of Thin Film Lubrication, in gap
Form sealing oil film；Alternator shaft high speed rotation simultaneously generates between the groove and alternator shaft of sealing floating ring medial surface
Sealing floating ring is floated by dynamic pressure effect, and Seal Oil enters sealing floating ring, power generation from the gap between sealing ring, resistance discs
Gap between machine shaft forms sealing oil film, and sealing floating ring and alternator shaft are separated；By sealing ring and resistance discs it
Between two-stage screw slot type dynamic pressure oil film sealing (between the first sealing ring of resistance discs and both sides, the second sealing ring) and seal
The sealing of two-stage groove type dynamic pressure oil film (the first sealing floating ring, the second sealing floating ring and power generation between floating ring and alternator shaft
Between machine shaft), realize the efficient sealed of generator hydrogen gas leakage.Compared with prior art, structure of the invention novel and unique, letter
It is single reasonable, it is easy to produce, it is easy to operate, helicla flute is set in resistance discs both sides, so that Seal Oil is quickly carried out, generates dynamic pressure rapidly
Effect, when hydrogen gas leakage need by between sealing ring and resistance discs the sealing of two-stage screw slot type dynamic pressure oil film and sealing it is floating
Two-stage groove type dynamic pressure oil film sealing between ring and alternator shaft, leakage rate are small；Under generator operation state, sealing ring and
The seal clearance very little formed by helicla flute dynamic pressure effect between resistance discs, so as to effectively reduce leakage；Hydrogen is let out
Primary seal when leakage is the two-stage screw slot type dynamic pressure oil film sealing between sealing ring and resistance discs, and sealing floating ring is merely possible to
Auxiliary seal, therefore, sealing the width of floating ring can be designed narrow, and sealing floating ring weight is lighter, seal table in floating ring
The groove of face design increases the buoyancy lift of sealing floating ring, and sealing floating ring both sides pressure difference is smaller, resulting axial force compared with
Small, above-mentioned multinomial factor can efficiently reduce the bite phenomenon between sealing floating ring and alternator shaft；Can effectively it change
The kind unstable vibration phenomenon caused because of floating ring type sealing bearing bush bite；Easy to use, effect is good, Turbo-generator Set hydrogen
Innovation on gas sealing mechanism has good social and economic benefit.
Claims (7)
1. a kind of Turbo-generator Set hydrogen seal device, including alternator shaft (12) and it is arranged on the outside of alternator shaft
Generator's cover (13), which is characterized in that be provided on the outside of alternator shaft (12) and be fixed on one with generator's cover (13)
The seal receptacle (2) risen, seal receptacle (2) are inside opening hollow structure of the opening towards alternator shaft, seal receptacle (2) opening
Alternator shaft (12) on be set with the resistance discs (1) being fixed together with alternator shaft, resistance discs (1) are from seal receptacle
(2) opening stretches into the inner cavity of seal receptacle, is respectively arranged in the seal receptacle of resistance discs (1) both sides along alternator shaft axial direction
On the periphery of the first sealing ring (3) and the second sealing ring (4) to horizontally slip, resistance discs (1) and the first sealing ring (3) right opposite
Be provided with uniformly distributed the first helicla flute (16) of multiple tracks, resistance discs (1) with to be provided with multiple tracks on the periphery of the second sealing ring (4) right opposite equal
The second helicla flute (17) of cloth, is provided with the first O-ring seal (7), second is close between the first sealing ring (3) and seal receptacle (2)
Be provided with the second O-ring seal (8) between seal ring (4) and seal receptacle (2), the first sealing ring (3) and the second sealing ring (4) it is interior
Side stretches into seal receptacle (2) opening towards alternator shaft and is in alternate setting with alternator shaft (12), stretches into seal receptacle
(2) it is provided with the first floating ring sliding groove (14) of circular ring shape on the medial surface of the first sealing ring (3) of opening, stretches into seal receptacle
(2) the second floating ring sliding groove (15) of circular ring shape, the sliding of the first floating ring are provided on the medial surface of the second sealing ring (4) of opening
It is provided with the first sealing floating ring (9) in slot (14), is provided with the second sealing floating ring (10) in the second floating ring sliding groove (15), first
Sealing floating ring (9) is provided with uniformly distributed the first groove (9a) of multiple tracks on the medial surface of the side of alternator shaft (12) face, the
Two sealing floating rings (9) are provided with uniformly distributed the second groove (10a) of multiple tracks on the medial surface of the side of alternator shaft (12) face,
The first spring (5), seal receptacle (2) madial wall and the second sealing are provided between seal receptacle (2) madial wall and the first sealing ring (3)
Second spring (6) is provided between ring (4), when alternator shaft is static, under the elastic force of the first spring and second spring, the
One sealing ring (3) and the right opposite of resistance discs (1) fit together, and the second sealing ring (4) is bonded with the right opposite of resistance discs (1)
Together, the inside and outside sealing oil-in (11) penetrated through is provided on the lateral wall of seal receptacle (2).
2. Turbo-generator Set hydrogen seal device according to claim 1, which is characterized in that first helicla flute
(16) and the depth of the second helicla flute (17) is 5 μm -10 μm.
3. Turbo-generator Set hydrogen seal device according to claim 1, which is characterized in that first groove (9a)
Depth with the second groove (10a) is 5 μm -10 μm.
4. Turbo-generator Set hydrogen seal device according to claim 1, which is characterized in that first sealing ring
(3) it is mutually parallel with the right opposite of resistance discs (1) and the right opposite is vertical with the axis of alternator shaft (12), the second sealing ring
(4) it is mutually parallel with the right opposite of resistance discs (1) and the right opposite is vertical with the axis of alternator shaft (12).
5. Turbo-generator Set hydrogen seal device according to claim 1, which is characterized in that first spring (5)
Telescopic direction it is parallel with the axial direction of alternator shaft (12).
6. Turbo-generator Set hydrogen seal device according to claim 1, which is characterized in that the second spring (6)
Telescopic direction it is parallel with the axial direction of alternator shaft (12).
7. a kind of hydrogen seal method based on Turbo-generator Set hydrogen seal device described in claim 1, which is characterized in that
It is introduced in Seal Oil to seal receptacle of the pressure higher than generator hydrogen gas side hydrogen pressure from the sealing oil-in (11) of seal receptacle by outside；
Under generator operation state, resistance discs with alternator shaft high speed rotation, the helicla flutes of resistance discs two sides and respective side
It generates dynamic pressure effect at sealing ring mating surface, forms axial opening force, both sides sealing ring and resistance discs are separated, i.e., the first sealing
Ring and the second sealing ring are all moved along alternator shaft axis direction towards far from resistance discs direction, both sides sealing ring and resistance discs it
Between form gap, Seal Oil enters gap from helicla flute and fills gap, makes the gap location between both sides sealing ring and resistance discs
Oil film is sealed in being formed in Condition of Thin Film Lubrication, gap；Alternator shaft high speed rotation simultaneously seals the groove of floating ring medial surface
Dynamic pressure effect is generated between alternator shaft, sealing floating ring is floated, Seal Oil is between sealing ring, resistance discs
The gap that gap enters between sealing floating ring, alternator shaft forms sealing oil film, and sealing floating ring and alternator shaft are separated；According to
Between the sealing of two-stage screw slot type dynamic pressure oil film and sealing floating ring and alternator shaft between sealing ring and resistance discs
Two-stage groove type dynamic pressure oil film seals, and realizes the efficient sealed of generator hydrogen gas leakage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810841627.8A CN108679231A (en) | 2018-07-27 | 2018-07-27 | Turbo-generator Set hydrogen seal device and encapsulating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810841627.8A CN108679231A (en) | 2018-07-27 | 2018-07-27 | Turbo-generator Set hydrogen seal device and encapsulating method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108679231A true CN108679231A (en) | 2018-10-19 |
Family
ID=63815993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810841627.8A Pending CN108679231A (en) | 2018-07-27 | 2018-07-27 | Turbo-generator Set hydrogen seal device and encapsulating method |
Country Status (1)
| Country | Link |
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| CN (1) | CN108679231A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110030386A (en) * | 2019-04-04 | 2019-07-19 | 南京航空航天大学 | A kind of floating type Surface Texture newel post face combination gas film sealing structure |
| CN113819239A (en) * | 2021-09-09 | 2021-12-21 | 乔丹 | Combined sealing system of cold air fan |
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